Electric furnace.



Patented Aug.5, |902.

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. No. 706,099. Patented Aug. 5, |902.

. A. PARKER.

ELECTRIC FUBNAGE.

(Application led May 8, 1901.) (lo luel.) 3 Sheds-shunt 2.

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No. 706,099. Patented Aug. 5', |902.

A. PARKER.

ELECTRIC FURNACE.

(Application tiled May 8, 1901.)

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me sums warms co. vn oooooooooooooooooooooo c UNITED STATES PATENTOEEIcE.

ARTHUR PARKER, OF CHORLEY, ENGLAND.

ELECTRIC FU RNACE.

SPECIFICATION forming part of Letters Patent No.

706,099, dated August 5, 1902.

Application filed May 8, 1901. Serial No. 59,321. (No model.)

To a/ZZ whom it may concer/1,:

Be it known that I, ARTHUR PARKER, a British subject, and a resident ofChorley, in the county of Lancaster, England, have in'n vented certainnew and useful Improvements in Electric Furnaces, of which the followingis a specification,

This invention relates to electric furnaces for smelting or otherpurposes, more particuro larly for producing Carbids of thealkalineearth metals, such as calcium carbid, and is designed to securea more Complete, perfect, and Continuous fusion of the raw material,that the fused mass in the Crucible shall be brought continually withinthe arc, and to avoid the clogging at present so frequent between thepositive, carbon' and the mass in the Crucible.

It consists, essentially, in a special con- -Qo struction of the furnaceor Crucible with a 3o form of the Crucible.

rotary or revolving movement, so as to bring every part of the bottom inturn under the positive Carbon, which is preferably made of rectangularoblong shape in cross-section.

The invention will be fully described with reference to the accompanyingdrawings.

Figure l is a front elevation. Fig. 2 is a transverse sectionalelevation. Fig. 3 is a transverse sectional elevation of a modified Fig.4E is a section of the carbon-holder on line an; Fig. 5, a plan ofmodification shown in Fig. 3.

The Crucible a is mounted or supported upon a platform or structure l),capable of rotating about its vertical axis on the fixed or stationarybed or foundation plates c, which are firmly secured to and suitablyinsulated upon the supporting blocks or pillars d. The platform b, whichsupports the crucible a, is

4o heldin position by the recessed base c, the

around or attached to the base.

foundation-plate c being made in two or more parts or sections andsecured in position around the base c, and it is rotated by a wormgearing with the toothed wheel gj, formed By this or c, is slowly ro-The platform Z) other mechanism the Crucible tated about its verticalaxis.

is formed with hollow sides U, forming a water-jacket for the purpose ofkeeping the 5o platform cool.

The carbon 71, is oblong in cross-section, either rectangular or oval,so as to extend across the crncible a in one direction and leavesufficient room at the sides for the material to fall in from thehoppers or Chutes 7c.

The carbon 7L is fitted to a sliding rack or frame m, capable of movingup and down in a slide u. When iu operation, it is slowly moved upwardby the worm o and wormtoothed wheel p as the material fills up theCrucible.

The powdered material to be fused is fed into the Crucible a from thehoppers or Chutes t in a thin stream through mica or other suitabletubes arranged to direct the material so that it shall fall into orthrough the arc, and thus become fused before reaching the crucibleitself. l'n addition to this the rotation of the Crucible a brings allthe material in it successively over and over again into the range ofthe arc. It is, however, to be understood that the arc is struck betweenthe positive carbon and whatever material may be in the Crucible and notbetween the positive carbon and the Crucible through the material.carbon 7L does not, therefore, come 4into Contact with the materialthroughout the whole operation. This is made possible owing to the factthat the Calcium-carbid charge becomes conductive in operation, owing tothe fact of its high temperature.

The furnace or Crucible a is preferably constructed with a lining a; ofcarbon on the bottom and around the sides, the whole of which can beremoved with each Charge as it is complete.

The invention is also applicable to smeltingfurnaces, such as shown inFig. 3, with a taphole r for running oif the molten mass. A truck orvessel s may be provided to receive it. in other respects the furnace isconstruct ed as described above.

l am well aware that a rectilinear` reciprocating movement hasbeen givento an electric furnace, and such does not constitute any part of myinvention.

What I claim as my invention, and desire to protect by Letters Patent,is

In an electric furnace the combination with the crucible a andpositive-Carbon electrode 7L placed diametrically across the Crucible,of the rotatable supporting-platform b, the recessed base e, thesupporting-plate c in two parts with recess into which the plai'fornnbase bs, the Worm-Wheel g around its periphery, my name in thepresence of two subscribing the wolm ffelaringtvith tthe *fieei g, ieWitnesses. chutes s to e iver e ma cria irect in o Y the arc, andmechanism for raising 'the carbon ARTHUR PARKER" 5 electrode h as theCrucible iiHs substantially NVitnesses:

as described. J. OWDEN OBMEN,

In Witness whereof I have hereunto signed B. TATHAM .VOODHEAD.

